nginx 1.10 does not return nginx_is_modern == TRUE

The regular expression that look at output from nginx -V to among other things determine if this version supports limit_conn_zone only looks at the first character in the second part of the version and now when version 1.10 is available it fails to recognise it as a modern version. Adding [0-9]+ would be enough to support all coming versions of nginx.

$this->server->nginx_is_modern = preg_match("/nginx\/1\.((1\.(8|9|(1[0-9]+)))|((2|3|4|5|6|7|8|9|[0-9]+)\.))/", implode('', drush_shell_exec_output()), $match);